Cabin Air Filters

Cabin Air Filter Many Ford, Lincoln and Mercury vehicles built since 1995 are equipped with a Cabin Air Filtration System. The Cabin Air Filtration System filters outside air, which enters the passenger compartment through the vehicle's heating, ventilation and air conditioning systems.

Air entering the vehicle can contain millions of microscopic particles, such as dust, pollen and spores. The Cabin Air Filter removes more than 90% of these particles that are larger than 3 microns. How big is a micron? The average grain of beach sand measures about 200 microns.

When to Replace the Cabin Air Filter The system's filter should be replaced every 15,000 miles, or once each year. In especially dusty or polluted environments, the filter should be replaced more often.